කෙයලිනයිට්
කෙයලිනයිට් යනු මැටිවල ඇති ඛනිජයකි. කෙයලිනයිට් අධික මැටි කිරිමැටි හෙවත් පිඟං මැටි ලෙස හැඳින්වේ.
- ^ "Kaolinite mineral information and data". MinDat.org. සම්ප්රවේශය 2009-08-05.
- ^ "Kaolinite Mineral Data". WebMineral.com. සම්ප්රවේශය 2009-08-05.
- ^ Kaolinite in the Handbook of Mineralogy
| කෙයලිනයිට් | |
|---|---|
 | |
| General | |
| Category | Phyllosilicates Kaolinite-serpentine group |
| රසායනික සූත්රය | Al2Si2O5(OH)4 |
| Strunz classification | 09.ED.05 |
| Crystal symmetry | Triclinic pedial H-M symbol: (1) Space group: P1 |
| Unit cell | a = 5.13 Å, b = 8.89 Å, c = 7.25 Å; α = 90°, β = 104.5°, γ = 89.8°; Z = 2 |
| Identification | |
| පාට / පැහැය | White, sometimes red, blue or brown tints from impurities |
| Crystal habit | Rarely as crystals, thin plates or stacked, More commonly as microscopic pseudohexagonal plates and clusters of plates, aggregated into compact, claylike masses |
| Crystal system | Triclinic |
| Cleavage | Perfect on {001} |
| Tenacity | Flexible but inelastic |
| Mohs scale hardness | 2–2.5 |
| Luster | Pearly to dull earthy |
| Streak | White |
| Specific gravity | 2.16–2.68 |
| Optical properties | Biaxial (–) |
| Refractive index | nα = 1.553–1.565, nβ = 1.559–1.569, nγ = 1.569–1.570 |
| 2V angle | Measured: 24° to 50°, Calculated: 44° |
| References | [1][2][3] |